We just took the 2350 out for the second time. Fresh water had been filled up on our last trip when we got home but when we arrived at the campground Wednesday and checked the tanks the fresh water was reading empty (????) even though we had filled her up before we left home ...so when we were leaving the park the next morning Vince filled up the fresh water tank to the 2/3 mark but by the time we got home traveling only 156 miles when we pulled in the driveway we had only 1/3 of the fresh water left.

We had someone flag us down a month ago to let us know that water was pouring from our RV ... we noticed water marks coming down from the where the fresh water goes in ... checked the area, the cap was on tight but you could see water had flowed out and it was wet.

We secured the cap tight and we can still see water marks coming down from the rv in that same spot where the fresh water goes in.

I swear I could hear water dripping in the middle of the night in the wall ... but ... there is no wet spot on the ground where anything could be dripping out ???????

You need to check the air hose by the fill hole. It may be plugged. I use a section of plastic pipe or hose to put over the hole and blow into it. I cannot explain why this works but it has stopped my water from coming back out the fill when going down the road.

My first thought is that the tank drain is open. if you have the pump turned on when travelling possibly the outside shower is open. Water will run out the overflow tube when the tank is full as the coach rocks.There are also drains for the shower that may be open. You might want to check under the bedboard to check the tank and the hoses.

OK we took a hose and blew through the mesh screen next to the fresh water fill. Vince said it had a little resistance at first and then it seemed like something broke free and it was cleared.

I also checked the outside shower and it is dry as a bone and closed up tight . I try to be sure everything is off while we are on the road including the water pump.

The large water spotted area down the side of the PC was where you put the fresh water in and that is where a concerned kid flaged us down to let us know we had a large amount of water pouring out when we turned the corner ... so it is coming from that area but we did not know why.

Thank You for all your suggestions and hopefully this will take care of it and it will be ok.

My first thought is that the tank drain is open. if you have the pump turned on when travelling possibly the outside shower is open. Water will run out the overflow tube when the tank is full as the coach rocks.There are also drains for the shower that may be open. You might want to check under the bedboard to check the tank and the hoses.

We had a 2350 on the Ford chasis, so I'm not familiar with any difference with the Sprinter. If you don't have water anywhere under the chasis, all your drain lines are apparently closed. The only thing I can think of that could cause your problem is that there is a syphon action taking place when you're moving - and the water is coming out your overflow line. Don't know how that would happen, so I would suggest you call the factory. By any chance are either of your holding tanks filling? But, if you don't have your water pump on, no water should be leaving the fresh water tank. Very strange...

You mentioned that when you blew in the air hole there was some resistance then it went away.

We had a problem filling the tank because the airline was getting clogged. When we looked under the bed which is wherever water tank is, it was staging and as a result any that entered the hose at the fill site clogged that hose and made filling impossible unless the fill was at a trickle or I placed two of my HWH lifts down and extended on fill side. I put a brace that removed the sag and the problem went away. This might be something that is related to your issue.

We are losing a little water from our tank as I drive but assume it is from sloshing around, not to your extent

There is a check valve on the city water inlet (not sure if that's where water is leaking, or the fresh water inlet to the tank). It can stick open (mine did on the 2350 sprinter) and water will leak...

The leak is coming from where you put the fresh water in the RV. The tank is filling up ok and registers full ... but when are driving and I guess turning corners the water is coming back out the the "area" where we put the fresh water in, we think from the overflow.

We have not driven it since we refilled the tank and since Vince was able to get the overflow line blown out and what seemed like a clog cleared .... we will have to take her out soon and hang some corners to see if it is coming out again .... I feel bad for the poor cars that were next to us and got an unwanted bath when we went by !!

There is a check valve on the city water inlet (not sure if that's where water is leaking, or the fresh water inlet to the tank). It can stick open (mine did on the 2350 sprinter) and water will leak...